the conditionals here were a bit confusing, branch-based PRs just
skipped commit links altogether.

loading up issues on @tangled.sh/core should be much faster because we
only have to resolve ~10 DIDs at a time. with a saturated did-handle
cache, this should be near-instant page load times.

introduces the filetree package.

eventually we will have a sticky side-panel style layout for any page
displaying diffs (probably makes most sense when we have split diffs),
and this file-tree will move there.

in dev mode; all html templates are loaded from disk on access. UI
updates take <100ms now:

- go files are watched by air/gust
- html/css files are watched by `tailwind -w`

html/css changes do not cause appview reload; but do trigger reload of
static assets and templates; giving us instant live reloads for UI
development.

follows our diff fragment colorscheme now

and move appview/state/settings to appview/settings

move settings router into a subpackage

also introduces a middleware package under appview, and turns TID() into
a global function that operates on a globally mutable TID clock.

PRs are no longer merged as a single commit.

takes a lot of inspiration from patchutils' interdiff algorithm. unlike gerrit; rebase detection is very much a work in progress.

This allows knots to be deployed on a platform like coolify

takes advantage of our existing cache-busting logic now

include latest round number and number of comments in the latest round
in db.GetPulls. this is then displayed on the summary line on /pulls.

fixes a a few links in blob and tree views that caused the link to
switch from handle to did.

Fixes a crash when viewing a single commit, and possibly appending something like `.patch` to the end of it. The `result` from the knotserver is nil and then leads to a nil pointer deref later.

from irc; thanks runxiyu!