plugins: web_api: package require wibble causes errors, even if not enabled

[jeffsf]

package require wibble
package require de1_machine

set plugin_name "web_api"

Causes failures on load in environments without wibble installed. If one is not going to use the plugin, there should be no reason to have to install wibble. Though preloaded in AndroWish, it is not present in, for example, macOS wish, including those installed with brew.

Suggest moving the offending dependency into a later phase of plugin initialization, where it is only evaluated if the plugin is active.

git merge-base main HEAD
55c65f1

[jeffsf]

[jeffsf]

Further, the attempts to define procs within the ::wibble namespace on a global context also fail

Suggest that namespace eval ::wibble or similar be used.

[jeffsf]

The loading problem seems to have been resolved by 495b831

The questions of where to declare proc ::wibble::check_auth are primarily stylistic in this specific instance. They still are done outside of proc main and register both a namespace and procs.