feat(core,app,cli): pair subtitle files with their video and play them

A crawl now keeps .srt/.ass/.ssa/.vtt files and pairs each with a video by
name: the video's name followed by a dot or nothing, the same inside a
Subs folder, the Subs/<video>/ layout, and failing those the only video in
the folder. The words past the video's name give the language and the
picker's title. They go in a new sidecars table (schema v12), rebuilt by
every crawl.

The desktop opens them while mpv opens the video and adds them with
sub-add through the stream registry once the file has loaded. One in the
preferred language is turned on when subtitles are on and the file has
none of its own playing; the rest wait in the subtitle menu.

crates/pstr-cli/src/main.rs

@@ -9,7 +9,7 @@ use anyhow::{Context, Result};
 use clap::{Parser, Subcommand};
 use proton_sdk::ids::{LinkId, NodeUid, VolumeId};
 use pstr_core::account::{PlaceKind, SignIn};
-use pstr_core::catalog::{Catalog, build_rows};
+use pstr_core::catalog::{Catalog, build_rows, build_sidecars};
 use pstr_core::config::AppDirs;
 use pstr_core::shares::AccountFolder;
 use pstr_core::sync::WatchSync;
@@ -425,6 +425,9 @@ async fn run(runtime: std::sync::Arc<tokio::runtime::Runtime>) -> Result<()> {
 
                 catalog
                     .replace_share(&share_id, &rows)
+                    .and_then(|()| {
+                        catalog.replace_sidecars(&share_id, &build_sidecars(&share_id, &nodes))
+                    })
                     .with_context(|| format!("store {share_id}"))?;
 
                 println!(