Update policy plan in response to new articles of association

[ElenaFdR]

We're currently updating our policy plan for 2024-2030 (#1401) before the new articles of association have been adopted; this has led to the removal of some content that's currently in flux or which will shortly be incorrect. The old policy plan included these points to make our commitment to being and staying nonprofit very clear - I propose we add these back as soon as the new articles of association are adopted.

Now deleted text cited comes from this historic 2023 version.

1. Introduction: New members of the Foundation for Public Code Vereniging must be wholly publicly owned organizations (article 4.2 of the association bylaws), benefiting all citizens and taxpayers. Public code stewarded by the Foundation for Public Code is available online for reuse by anyone anywhere, worldwide.

Proposal: We should keep an explanation that all members are nonprofit organizations that work directly with wholly publicly owned orgs, benefiting all citizens and taxpayers, etc.

2. Strategy: Public code stewarded by the Foundation is openly available for reuse by everyone, but only members (wholly publicly owned organizations) can determine the governance and the organization’s stewardship priorities.

Proposal: Replace with an explanation of our nonprofit governance for the benefit the public/our partners.

Mission: We are controlled by our members, who are wholly publicly controlled organizations.

Proposal: Update mission to explain how we're governed for the benefit of the public

4.1 Fundraising: Please note that the Foundation for Public Code will not actively pursue donations and gifts and will spend no or very limited time on fundraising (not more than 5% of its budget).

Proposal: get the board/GA to (re)commit to the fundraising percentage; it's core to being a well-governed non-profit.