Add the local project, framework submodule, hooks and templates

After the repositories and the mirror, the script now creates the local
project: the directory, git on main, credential-free origin (and github)
remotes, and the license history from Gitea. Then it adds the framework as
a submodule over SSH, installs its skills and git hooks once (plan gate
optional), and copies the AGENTS.md and artifact registry templates.

Nothing is overwritten without a yes: an existing directory, core.hooksPath,
AGENTS.md or docs/artifact-registry.md each ask first (default no). Without
SSH the framework steps can only be skipped, after a yes. No commit is made
in the new project. New optional config key FRAMEWORK_REPO.

New library files git.sh, localproject.sh and framework.sh. Tests run real
git against local bare repositories that stand in for Gitea and the
framework, with a private git configuration (769 checks). The README is now
the full guide.

Task: MIL-003#1
Task: MIL-003#2
Task: MIL-003#3
Task: MIL-003#4
Task: MIL-003#5
Refs #15
Refs #16
Refs #17
Refs #18
Refs #19

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/lib/preflight.sh

@@ -108,9 +108,7 @@ preflight_github() {
 # or without access it is simply "not passed"; it never stops the run.
 test_gitea_ssh() {
   local host port output status=0
-  host="${CONFIG[GITEA_URL]#https://}"
-  host="${host%%/*}"
-  host="${host%%:*}"
+  host="$(gitea_host)"
   port="${CONFIG[GITEA_SSH_PORT]}"
   STATE[is_ssh_ok]=0
   STATE[ssh_note]="failed (check your SSH key and that $host:$port is reachable)"
@@ -163,5 +161,6 @@ run_preflight() {
   fi
   test_gitea_ssh
   decide_existing_repositories
+  inspect_local_directory
   say "All checks passed."
 }