Feat/open projects config to any (#681)

* feat(server): derive owner/repo display name for any remote host

Generalize deriveProjectGroupingName so any remote:<host>/<segments...>
project key returns the last two path segments (owner/repo) instead of
just the trailing segment. Path-fallback for non-remote keys is unchanged.

Brings GitLab, Gitea, Bitbucket, and self-hosted remotes to parity with
the prior github.com-only behavior — no separate special-case needed.

* feat(app): show projects from any git remote in Projects settings

Remove the isSupportedProjectKey filter so workspaces with non-GitHub
remotes (GitLab, Gitea, Bitbucket, self-hosted, ssh-style) appear in the
Projects list and route to the project settings screen. The daemon RPCs,
config schema, and registry were already host-agnostic; this lifts a
client-side filter that hid them.

Also remove the now-vestigial hiddenUnsupportedRemoteCount field from
ProjectSummary, BuildProjectsResult, and UseProjectsResult — once the
filter is gone, the count is always zero and the field is dead state.
This is an internal app-package type, not a wire schema, so deletion is
safe.

* chore(app): simplify Projects empty state to "No projects yet"

Drop the "Non-GitHub remote projects aren't supported yet" empty-state
branch — it can no longer fire now that any git remote is shown. The
empty state is unconditional now.

* test(app): cover non-GitHub remote in projects-settings e2e

Add a fixture that creates a temp git repo with origin pointing at a
gitlab.com URL and exercises the same paseo.json read/edit/save flow
already covered for local repos. Verifies the project surfaces with the
"acme/app" display name and that the round-trip persists correctly.

Extracted the remote-setup branch in createTempGitRepo into a small
configureRemote helper to keep the main function under the cyclomatic
complexity limit.

---------

Co-authored-by: Mathias Kurz <mkurz@stamus-networks.com>

packages/app/src/hooks/use-projects.test.ts

@@ -252,7 +252,6 @@ describe("useProjects", () => {
     });
     expect(Object.keys(result.current.projects[0] ?? {}).sort()).toEqual([
       "githubUrl",
-      "hiddenUnsupportedRemoteCount",
       "hostCount",
       "hosts",
       "onlineHostCount",

packages/app/src/hooks/use-projects.ts

@@ -15,7 +15,6 @@ export interface ProjectHostError {
 
 export interface UseProjectsResult {
   projects: ProjectSummary[];
-  hiddenUnsupportedRemoteCount: number;
   hostErrors: ProjectHostError[];
   isLoading: boolean;
   isFetching: boolean;
@@ -127,7 +126,6 @@ export function useProjects(): UseProjectsResult {
 
   return {
     projects: projectsQuery.data?.projects ?? [],
-    hiddenUnsupportedRemoteCount: projectsQuery.data?.hiddenUnsupportedRemoteCount ?? 0,
     hostErrors: projectsQuery.data?.hostErrors ?? [],
     isLoading: projectsQuery.isLoading,
     isFetching: projectsQuery.isFetching,