* shell: expand `~` in local file path arguments
The weed shell parses commands itself instead of going through an OS
shell, so a path like `~/Downloads/foo.meta` was passed verbatim to
`os.Open`, which fails because no `~` directory exists. Users had to
spell out absolute home paths in every command.
Add an `expandHomeDir` helper that resolves a leading `~` or `~/...` to
the user's home directory, and run user-supplied local file paths in
the affected shell commands through it:
fs.meta.load (positional file)
fs.meta.save (-o)
fs.meta.changeVolumeId (-mapping)
s3.iam.export (-file)
s3.iam.import (-file)
s3.policy (-file)
s3tables.bucket (-file)
s3tables.table (-file, -metadata)
volume.fsck (-tempPath)
Filer-namespace path flags (`-dir`, `-path`, `-locationPrefix`, etc.)
are unaffected; they live in the filer, not on the local FS.
* shell: reuse util.ResolvePath instead of a new helper
util.ResolvePath already does tilde expansion; drop the local
expandHomeDir helper and route every shell call site through it.
* Add shared s3tables manager
* Add s3tables shell commands
* Add s3tables admin API
* Add s3tables admin UI
* Fix admin s3tables namespace create
* Rename table buckets menu
* Centralize s3tables tag validation
* Reuse s3tables manager in admin
* Extract s3tables list limit
* Add s3tables bucket ARN helper
* Remove write middleware from s3tables APIs
* Fix bucket link and policy hint
* Fix table tag parsing and nav link
* Disable namespace table link on invalid ARN
* Improve s3tables error decode
* Return flag parse errors for s3tables tag
* Accept query params for namespace create
* Bind namespace create form data
* Read s3tables JS data from DOM
* s3tables: allow empty region ARN
* shell: pass s3tables account id
* shell: require account for table buckets
* shell: use bucket name for namespaces
* shell: use bucket name for tables
* shell: use bucket name for tags
* admin: add table buckets links in file browser
* s3api: reuse s3tables tag validation
* admin: harden s3tables UI handlers
* fix admin list table buckets
* allow admin s3tables access
* validate s3tables bucket tags
* log s3tables bucket metadata errors
* rollback table bucket on owner failure
* show s3tables bucket owner
* add s3tables iam conditions
* Add s3tables user permissions UI
* Authorize s3tables using identity actions
* Add s3tables permissions to user modal
* Disambiguate bucket scope in user permissions
* Block table bucket names that match S3 buckets
* Pretty-print IAM identity JSON
* Include tags in s3tables permission context
* admin: refactor S3 Tables inline JavaScript into a separate file
* s3tables: extend IAM policy condition operators support
* shell: use LookupEntry wrapper for s3tables bucket conflict check
* admin: handle buildBucketPermissions validation in create/update flows
