Revert "Release/78.0.0" (#392)

Reverts #391

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Rolls back monorepo and package versions and removes latest changelog
sections to revert the 78.0.0 release.
> 
> - **Version rollbacks**:
>   - Root `package.json`: `version` `78.0.0` -> `77.0.0`.
> - `packages/keyring-internal-snap-client/package.json`: `version`
`8.0.0` -> `7.2.0`.
> - `packages/keyring-snap-bridge/package.json`: `version` `18.0.0` ->
`17.3.0`.
> - **Changelog updates**:
> - `packages/keyring-internal-snap-client/CHANGELOG.md`: remove `8.0.0`
section; update `[Unreleased]` compare link to start from `7.2.0`.
> - `packages/keyring-snap-bridge/CHANGELOG.md`: remove `18.0.0`
section; update `[Unreleased]` compare link to start from `17.3.0`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
b272c44. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: cryptodev-2s

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@metamask/accounts-monorepo",
-  "version": "78.0.0",
+  "version": "77.0.0",
   "private": true,
   "description": "Monorepo for MetaMask accounts related packages",
   "repository": {

packages/keyring-internal-snap-client/CHANGELOG.md

@@ -7,8 +7,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [8.0.0]
-
 ### Changed
 
 - **BREAKING:** Migrate `KeyringInternalSnapClientMessenger` to new `Messenger` type from `@metamask/messenger` ([#383](https://github.com/MetaMask/accounts/pull/383))
@@ -153,8 +151,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - This new version fixes a bug with CJS re-exports.
 - Initial release ([#24](https://github.com/MetaMask/accounts/pull/24))
 
-[Unreleased]: https://github.com/MetaMask/accounts/compare/@metamask/keyring-internal-snap-client@8.0.0...HEAD
-[8.0.0]: https://github.com/MetaMask/accounts/compare/@metamask/keyring-internal-snap-client@7.2.0...@metamask/keyring-internal-snap-client@8.0.0
+[Unreleased]: https://github.com/MetaMask/accounts/compare/@metamask/keyring-internal-snap-client@7.2.0...HEAD
 [7.2.0]: https://github.com/MetaMask/accounts/compare/@metamask/keyring-internal-snap-client@7.1.0...@metamask/keyring-internal-snap-client@7.2.0
 [7.1.0]: https://github.com/MetaMask/accounts/compare/@metamask/keyring-internal-snap-client@7.0.0...@metamask/keyring-internal-snap-client@7.1.0
 [7.0.0]: https://github.com/MetaMask/accounts/compare/@metamask/keyring-internal-snap-client@6.0.0...@metamask/keyring-internal-snap-client@7.0.0

packages/keyring-internal-snap-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@metamask/keyring-internal-snap-client",
-  "version": "8.0.0",
+  "version": "7.2.0",
   "description": "MetaMask Keyring Snap internal clients",
   "keywords": [
     "metamask",

packages/keyring-snap-bridge/CHANGELOG.md

@@ -7,8 +7,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [18.0.0]
-
 ### Changed
 
 - **BREAKING:** Migrate `SnapKeyringMessenger` to new `Messenger` type from `@metamask/messenger` ([#383](https://github.com/MetaMask/accounts/pull/383))
@@ -596,8 +594,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial release.
 
-[Unreleased]: https://github.com/MetaMask/accounts/compare/@metamask/eth-snap-keyring@18.0.0...HEAD
-[18.0.0]: https://github.com/MetaMask/accounts/compare/@metamask/eth-snap-keyring@17.3.0...@metamask/eth-snap-keyring@18.0.0
+[Unreleased]: https://github.com/MetaMask/accounts/compare/@metamask/eth-snap-keyring@17.3.0...HEAD
 [17.3.0]: https://github.com/MetaMask/accounts/compare/@metamask/eth-snap-keyring@17.2.0...@metamask/eth-snap-keyring@17.3.0
 [17.2.0]: https://github.com/MetaMask/accounts/compare/@metamask/eth-snap-keyring@17.1.0...@metamask/eth-snap-keyring@17.2.0
 [17.1.0]: https://github.com/MetaMask/accounts/compare/@metamask/eth-snap-keyring@17.0.0...@metamask/eth-snap-keyring@17.1.0

packages/keyring-snap-bridge/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@metamask/eth-snap-keyring",
-  "version": "18.0.0",
+  "version": "17.3.0",
   "description": "Snaps keyring bridge.",
   "repository": {
     "type": "git",