chore: Enhance developer tooling and documentation

Adds `actionlint` to the pre-commit configuration to validate GitHub Actions workflows.

Significantly expands the `AGENTS.md` file with a comprehensive summary of new features and changes in Go 1.24 and 1.25, along with actionable recommendations for the project.

Additionally, normalizes markdown list formatting across various documentation files for consistency.

.pre-commit-config.yaml

@@ -29,6 +29,16 @@ repos:
       - id: check-added-large-files
       - id: check-symlinks
       - id: check-executables-have-shebangs
+  - repo: local
+    hooks:
+    - id: actionlint
+      name: Lint GitHub Actions workflow files
+      description: Runs actionlint to lint GitHub Actions workflow files
+      language: golang
+      types: ["yaml"]
+      files: ^\.github/workflows/
+      entry: actionlint
+      minimum_pre_commit_version: 3.0.0
   - repo: https://github.com/golangci/golangci-lint
     rev: v2.6.1
     hooks: