Update agent landing page and readme #4801

Job	Run time
Build unsigned snapshot	3m 36s
Component Tests	51s
Lint	37s
Unit Tests	3m 19s
Build Grafana Dashboard Example	1m 11s
Build signed snapshot	6m 58s
Performance Tests	7m 11s
Integration Tests - Official OSS Images (bookworm, stable, debian)	3m 18s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	3m 41s
Integration Tests (rockylinux, 8)	5m 21s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	3m 10s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	3m 24s
Integration Tests - Official OSS Images (alpine, stable, alpine)	3m 26s
Integration Tests (rockylinux, 9)	4m 57s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	3m 34s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	3m 21s
Integration Tests (almalinux, 8)	5m 12s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	3m 33s
Integration Tests (almalinux, 9)	4m 34s
Integration Tests (amazonlinux, 2)	5m 32s
Integration Tests (amazonlinux, 2023)	4m 59s
Integration Tests (oraclelinux, 8)	6m 22s
Integration Tests (oraclelinux, 9)	5m 16s
Integration Tests (ubuntu, 24.04)	3m 43s
Integration Tests (alpine, 3.17)	2m 53s
Integration Tests (alpine, 3.18)	2m 55s
Integration Tests (alpine, 3.19)	3m 7s
Integration Tests (alpine, 3.20)	2m 55s
Integration Tests (debian, bullseye-slim)	3m 27s
Integration Tests (debian, bookworm-slim)	3m 19s
trigger-release-workflow	0s
	1h 55m 42s

Provide feedback