Added a bunch of content about how to use ASN templates.
Added a section with a list of things to do when adding a new template.
Added mappiong of ASN.1 notation to template lines.
Added ASN.1 type specific information.
Added a checklist at the end to head off the common issues.
Added references to ASN_TEMPLATE.md.
Added other informatrion.
Add an AGENTS.md aimed at AI agents helping users integrate wolfSSL
into their own projects: build paths (autotools, CMake,
user_settings.h), commonly used configure options and their CMake and
macro equivalents, a directory map, minimal TLS client flow, porting
hooks, verification steps, and common gotchas. CLAUDE.md just points
to AGENTS.md.
Contributor-focused agent notes move to AGENTS.local.md and
CLAUDE.local.md, which stay untracked; update .gitignore to ignore
the local variants instead of AGENTS.md/CLAUDE.md.
