Update agent landing page and readme #4804

Job	Run time
Build signed snapshot	6m 33s
Build Grafana Dashboard Example	33s
Build unsigned snapshot	3m 34s
Component Tests	47s
Lint	48s
Unit Tests	3m 15s
Performance Tests	7m 13s
Integration Tests - Official OSS Images (bookworm, stable, debian)	3m 13s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	3m 10s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	3m 6s
Integration Tests (rockylinux, 8)	5m 31s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	3m 24s
Integration Tests - Official OSS Images (alpine, stable, alpine)	3m 15s
Integration Tests (rockylinux, 9)	4m 38s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	3m 29s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	3m 12s
Integration Tests (almalinux, 8)	5m 7s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	3m 10s
Integration Tests (almalinux, 9)	4m 43s
Integration Tests (amazonlinux, 2)	5m 43s
Integration Tests (amazonlinux, 2023)	5m 0s
Integration Tests (oraclelinux, 8)	6m 11s
Integration Tests (oraclelinux, 9)	5m 15s
Integration Tests (ubuntu, 24.04)	3m 33s
Integration Tests (alpine, 3.17)	2m 52s
Integration Tests (alpine, 3.18)	3m 7s
Integration Tests (alpine, 3.19)	2m 51s
Integration Tests (alpine, 3.20)	3m 4s
Integration Tests (debian, bullseye-slim)	3m 39s
Integration Tests (debian, bookworm-slim)	3m 29s
trigger-release-workflow	0s
	1h 53m 25s

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