Add a plugin dependencies map

Currently each block is associated with a single plugin which needs to be activated in order for the block to work.
Some blocks have dependencies on other plugins and will not work unless those dependencies are satisfied.
To minimise the plugins that need to be active normally we would need to be able to dynamically load the plugins required to deliver the required functionality.

Requirements

To minimise the number of plugins loaded by default
To dynamically load the required plugins for a particular post.

In the table of examples below

Plugin ref (_oik_sc_plugin ) is the delivering plugin set for each block
Depends on (_oikp_dependency ) records the component dependencies; the additional plugins needed to satisfy the request. May be set for oik-plugins, block and block_example CPTs.

Some example use cases below

Post type	Name	Plugin ref	Depends
oik-plugin	UK tides	-	oik
block	UK tides	oik-blocks	-
oik-plugin	oik-magnetic-poetry	-	-
block	magnetic-poetry	oik-magnetic-poetry	-
block_example	Magnetic poetry of Hello dolly	-	hello
oik-plugin	woo-gutenberg-products-block	-	woocommerce

For any plugin listed in the Depends column we would also need to satisfy that plugin's dependencies. WordPress core is a given. The logic will have to cater for cyclical dependencies, but should not concern itself with the order in which the dependencies are satisfied.

This requires a pre-requisite change to the oik-plugins and oik-shortcodes plugins to register the _oikp_dependency field for oik-plugins, block and block_example.

Proposed solution

Add a component-dependencies CSV file, built from the posts in oik-plugins, which contains the list of plugins referenced in the Depends on field.
The file will be keyed by the plugin name.

Each record will list the dependent plugins - comma separated e.g.

uk-tides/uk-tides.php,oik/oik.php
plugin_name,depends_1_plugin_name,depends_2_plugin_name,...

Update the entries in the oik-loader.n.csv file for block and block_example to include the comma separated list of dependencies. So, for the block_example "Magnetic poetry of Hello dolly" the record would be
```
block_example/magnetic-poetry-hello-dolly/,ID,oik-magnetic-poetry/oik-magnetic-poetry.php,hello/hello.php
```
When adding a plugin to the array of active plugins ensure all the dependencies are resolved.

bobbingwide / oik-loader

Add a plugin dependencies map #2

Requirements

Proposed solution